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About a month ago I set out to perform some preventive maintenance on my 99 740i with 96K miles. I changed CCV, VCG, manifold gaskets, and manifold front and rear cover gaskets. The VCG were leaking a little but had no signs of a failed CCV. I ended up breaking one of the vacuum connections off of the new CCV. I ordered another one 2 day shipping. It was the same $40ish one that I ordered before (OEM one is $80). All maintenance done and I fired it up. Started and ran fine but had a howling sound, and lots of suction when dipstick was pulled. Sounds like a failed CCV, but I just replaced it. Drove it like that for a month. No smoke or anything, just the sound and MPG. I normally get 400miles per tank mixed city and I only got 325. So this weekend I pryed the CCV cover off the other new one I had broke on install, and replaced with one on the car. Howling sound and suction gone. MPG already back up to 21+ mpg(was 17 with bad CCV). Inspected the "new" CCV diaphram and this is what I found.

Must of happened during assembly. I should of ordered the OEM to begin with.